Process of manufacturing shoe-heels.



No. 686,730. Patented Nov.'|9, l90l. H. HELLWEG.

PROCESS OF MANUFACTURING SHOE HEELS.

[Application filed Jan. 18, 1901.)

(No Model.)

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PROCESS OF MANUFACTURING SHOE-HEELS.

SPECIFICATION forming part of Letters Patent NO. 686,730, dated November19, 1901.

Application filed January 1 8, l9 0 1.

tion.

My invention relates to improvements in processes of manufacturingaluminium heels for shoes.

My invention is explained by reference to the accompanying drawings, inwhich- Figure 1 is a top View, and Fig. 2 a longitudinal verticalsection, of one of the shoeheels formed by my process. Fig. 3 is a sideview of one-half of the metallic mold in which the heel is cast. Fig. 4tis a longitudinal vertical section of onehalf of the core-box employedin forming sand cores used in casting the heel. Fig. 5 is a top viewshowing the two parts of the core-box secured together.

Like parts are identified by the same reference-letters through theseveral views.

One form of metallic shoe-heel made by my process consists of a thinhollow shell A, having horizontal cross-piece B, (to which a nonmetallictread-piece O is attached,) metallic cross-pieces D, and flexiblefastening-barbs E. Owing to the peculiar shape of the shell A it becomesnecessary to cast the same in a twopart separable metallic mold, one ofwhich parts is shown at F.

G is the core, which is preferably made of sand.

H is the duct or passage through which the molten metal is poured intothe mold.

I I are horizontal apertures formed in the core in which the moltenmetal flows to form the cross-pieces D of the heel. The flexible barbs E(shown in dotted lines) are held in place by the core preparatory tocasting the heel,when the molten metal forming the crosspiece congealsaround the lower ends of said barbs and holds them in place.

J J represent the respective halves of the core-box in which the core Gis formed. The respective halves J J are held in place preparatory toforming the core G therein in the ordinary way, when the horizonal barsK are inserted through the apertures L, formed in the sides and one endof the core-box, for the Serial No. 43,691. (No specimens.)

purpose of forming the mold for the horizontal bars D and for supportingthe barbs E. A similar bar M is also inserted in the aperture N for thepurpose of forming a mold for the cross-piece B. This being done,electric coils O are placed upon the protruding ends of the bars K,whereby said bars become electromagnets and are thereby caused to holdthe barbs E rigidly in place while the sand which forms the core G isbeing packed around them. The sand having been placed in the core-boxand the same thoroughly packed, filling the space P, the electric coilsO are removed from said bars K, whereby they are demagnetized and ceaseto attract said barbs E when said bars K are withdrawn from thecore-box,leaving said barbs supported by the sand in their properplaces. This being done, the respective halves J of the core-box areseparated and the core is removed and placed in the mold F, as indicatedin Fig. 3. All that part of the core between the lines a and 1) formsthe core proper of the shell A, and when in place a space Q is leftbetween such part of the core and the mold for the reception of themolten metal, which is poured into the duct H. The parts of the core R Rabove and below the lines a and b are nicely fitted to the walls of themold and serve to hold the central part of the core G securely in placemidway between the walls of the mold, while such parts R serve as stopsfor the molten metal. When the cores have been thus located in the mold,the mold is ready to be used for casting the heels in the ordinarymannor.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. The improved process herein describedof manufacturing aluminium shoe-heels, consisting, first, in supportingthe heel-retaining barbs upon electromagnet bars within a core box,preparatory to forming the core around them; second, in forming a corearound said barbs and electromagnetbars; third, in cutting out theelectric circuit com municating with the electromagnet-bars, wherebysaid bars are demagnetized and said barbs released therefrom; fourth, inremoving said bars from the core; as set forth.

2. The process herein described, of mauu 10 with their heads exposedWithin the apertures formed by the removed bars, whereby, as the heel iscast, the molten metal will congeal in said apertures around the headsof, and form supporting-bars for, said barbs between the Walls of theheel, substantially as set forth.

In testimony whereof I affix my signature in the presence of twoWitnesses.

, HENRY I-IELLWEG.

\Vitnesses:

Ms. B. ERWIN, HERMAN BLEICK.

